[issue20121] quopri_codec newline handling

[Martin Panter]

Martin Panter added the comment:

Okay so maybe the documentation should include these restrictions on encoding:

* The data being encoded should only include \r or \n bytes that are part of \n or \r\n newline sequences. Encoding arbitrary non-text data is not supported.
* The two kinds of newlines should not be mixed
* If \n is used for newlines in the input, the encoder will output \n newlines, and they will need converting to CRLF in a later step to conform to the RFC

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